Did you know you can post content in your wordpress blog and add a password so that only those with your permission can see it. For example, the password on this post is 1234.
I was hoping you could at least have a visible excerpt, otherwise how do people even know they want access to this post. But so far I have not seen how to do this.
To do this yourself, look for the "Password Protect This Post" in the Write Post area - http://www.yourblogname.com/wp-admin/post-new.php